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    Hybrid-two-stage pulse tube refrigerator
    1.
    发明授权
    Hybrid-two-stage pulse tube refrigerator 失效
    混合二级脉冲管冰箱

    公开(公告)号：US06256998B1

    公开(公告)日：2001-07-10

    申请号：US09556552

    申请日：2000-04-24

    Applicant: Jin Lin Gao

    Inventor： Jin Lin Gao

    IPC: F25B900

    CPC classification number: F25B9/145 ,  F25B9/10 ,  F25B2309/1408 ,  F25B2309/1411 ,  F25B2309/1418 ,  F25B2309/1424 ,  F25B2309/14241

    Abstract: A two-stage pulse tube refrigerator comprises a pressure wave generator-compressor, first stage and second stage regenerators, first stage and second stage pulse tubes, heat exchangers and a hybrid phase shift mechanism for the first and second stage pulse tubes. The second stage phase shift mechanism includes double fixed orifices while the first stage shifter is an arrangement including one of a) 4 valves, b) 5 valves c) 2 active buffers or d) 3 active buffers. The double fixed orifice phase shifter is located either at room temperature or is thermally connected with the first stage cold end. Two-stage pulse tube refrigerators with a hybrid phase shifter have increased second stage regenerator performance at lower temperature. Pressure drop through the valves and compressor power consumption are decreased, and losses from phase interaction between each stage are eliminated.

    Abstract translation: 两级脉冲管式冰箱包括压力波发生器 - 压缩机，第一级和第二级再生器，第一级和第二级脉冲管，用于第一和第二级脉冲管的热交换器和混合相移机构。 第二级相移机构包括双固定孔，而第一级换档器是包括a）4个阀门中的一个的装置，b）5个阀门c）2个主动缓冲器或d）3个主动缓冲器。 双固定孔移相器位于室温或与第一级冷端热连接。 具有混合移相器的两级脉冲管式冰箱在较低温度下具有增加的第二级再生器性能。 通过阀门的压降和压缩机功率消耗降低，并且消除了每个阶段之间的相位相互作用的损失。

    Reduced input power cryogenic refrigerator
    2.
    发明授权
    Reduced input power cryogenic refrigerator 有权
    降低输入功率低温冰箱

    公开(公告)号：US08783045B2

    公开(公告)日：2014-07-22

    申请号：US11721513

    申请日：2005-01-13

    Applicant: Mingyao Xu ,  Jin Lin Gao

    Inventor： Mingyao Xu ,  Jin Lin Gao

    IPC: F25B9/00

    CPC classification number: F25B9/145 ,  F25B9/14 ,  F25B2309/1408 ,  F25B2309/1411 ,  F25B2309/1418 ,  F25B2309/1424 ,  F25B2309/14241 ,  F25B2600/2519

    Abstract: The present invention relates to valved cryogenic refrigerators, in particular, Gifford McMahon (GM) refrigerators, and GM type pulse tube refrigerators where gas is cycled between high and low pressures by a valve mechanism that connects to an expander. Input power is reduced by use of a buffer volume which stores gas that flows to and from the warm end of the regenerator through a valve that opens and closes during the periods when the main supply and return valves are closed and is closed when the main supply and return valves are open.

    Abstract translation: 本发明涉及带阀的低温冰箱，特别是吉福德·麦克马洪（GM）冰箱，以及GM型脉冲管制冷器，其中气体通过连接到膨胀机的阀机构在高低压之间循环。 通过使用缓冲体积来减少输入功率，该缓冲体积存储在再生器的暖端流动的气体通过在主供给和返回阀关闭的时段期间打开和关闭的阀，当主供应 回流阀打开。

    Pulse tube refrigerator
    5.
    发明授权
    Pulse tube refrigerator 失效
    脉管冰箱

    公开(公告)号：US5974807A

    公开(公告)日：1999-11-02

    申请号：US957624

    申请日：1997-10-24

    Applicant: Jin Lin Gao ,  Yoichi Matsubara ,  Yu Hiresaki

    Inventor： Jin Lin Gao ,  Yoichi Matsubara ,  Yu Hiresaki

    IPC: F25B9/00 ,  F25B9/14

    CPC classification number: F25B9/145 ,  F25B2309/1408 ,  F25B2309/1418 ,  F25B2309/14181 ,  F25B2309/14241 ,  F25B2309/1425 ,  F25B9/10

    Abstract: A pulse tube refrigerator which can generate cryogenic temperatures of below 10 K includes first and second refrigeration stages. Each stage includes a pulse tube and an associated regenerator provided at the low temperature side of the pulse tube. A pressure fluctuation generator having a compressor and a first to a fourth valve is provided at the high temperature side of each regenerator. The high temperature sides of each pulse tube are connected by a continuous channel while the high temperature side of each pulse tube and the high temperature side of each regenerator are connected by a by-pass channel. A magnetic material having a rare-earth element and a transition metal is used as a regenerative material for the regenerator. When pressure fluctuation is generated in each pulse tube at the phase difference angle of 180.degree., respectively, a working gas is transferred between the high temperature sides of each pulse tube, therefore, the phase angle between the pressure fluctuation in each pulse tube and the displacement of the working gas is optimized. Further, the flow amount of the operating gas sent to each regenerator is limited using a by-pass channel.

    Abstract translation: 可以产生低于10K的低温温度的脉冲管制冷器包括第一和第二制冷阶段。 每个级包括脉冲管和设置在脉冲管的低温侧的相关联的再生器。 具有压缩机和第一至第四阀的压力波动发生器设置在每个再生器的高温侧。 每个脉冲管的高温侧通过连续通道连接，而每个脉冲管的高温侧和每个再生器的高温侧通过旁路通道连接。 使用具有稀土元素和过渡金属的磁性材料作为再生器的再生材料。 当每个脉冲管在180°的相位角处产生压力波动时，工作气体在每个脉冲管的高温侧之间传递，因此，每个脉冲管的压力波动与 优化了工作气体的排量。 此外，使用旁路通道限制发送到每个再生器的工作气体的流量。

    Multi-stage pulse tube with matched temperature profiles
    8.
    发明授权
    Multi-stage pulse tube with matched temperature profiles 有权
    具有匹配温度曲线的多级脉冲管

    公开(公告)号：US07568351B2

    公开(公告)日：2009-08-04

    申请号：US11333760

    申请日：2006-01-17

    Applicant: Mingyao Xu ,  Jin Lin Gao

    Inventor： Mingyao Xu ,  Jin Lin Gao

    IPC: F25B9/00

    CPC classification number: F25B9/145 ,  F25B9/10 ,  F25B2309/1408 ,  F25B2309/1413 ,  F25B2309/1418 ,  F25B2309/1421 ,  F25B2309/14241 ,  F25B2400/17 ,  F25D19/006

    Abstract: Convection losses associated with different temperature profiles in the pulse tubes and regenerators of multi-stage pulse tubes mounted in helium gas in the neck tube of a MRI cryostat are reduced by providing one or more of thermal bridges, and/or insulating sleeves between one or more pulse tubes and regenerators, and/or spacers, and spacer tubes, in one or more pulse tubes and regenerators.

    Abstract translation: 通过在MRI低温恒温器的颈管中安装在氦气中的多级脉冲管的脉冲管和再生器中的不同温度曲线相关的对流损耗通过在一个或多个第一或第二组之间提供一个或多个热桥和/或绝缘套管来减少 一个或多个脉冲管和再生器中的更多脉冲管和再生器，和/或间隔物和间隔管。

    Fast warm up pulse tube
    9.
    发明授权
    Fast warm up pulse tube 失效
    快速预热脉冲管

    公开(公告)号：US07191600B2

    公开(公告)日：2007-03-20

    申请号：US10500982

    申请日：2003-03-05

    Applicant: Jin Lin Gao ,  Ralph C. Longsworth

    Inventor： Jin Lin Gao ,  Ralph C. Longsworth

    IPC: F25B9/00

    CPC classification number: F25B45/00 ,  F25B9/145 ,  F25B2309/006 ,  F25B2309/1408 ,  F25B2309/1411 ,  F25B2309/1418 ,  F25B2309/14181 ,  F25B2309/14241

    Abstract: This invention provides an improved means of quickly warming a pulse tube (165) by shifting the phase relation of flow to the warm end of the pulse tube relative to flow to the warm end (117) of the pulse tube relative to flow to the warm end of the regenerator (160) using a “four valve” concept and the “active buffer” concept. Several different pulse tube configurations and valve timing relations that are effective at reversing the cycle from the normal mode, which produces cooling at the pulse tube heat station, to a reverse mode that produces heating are disclosed.

    Abstract translation: 本发明提供了一种改进的方法，通过相对于流向脉管的暖端（117）的流动将相对于脉冲管的温端的相位关系移动到脉动管（165）来快速加温 使用“四阀”概念和“主动缓冲器”概念的再生器（160）的端部。 公开了几种不同的脉冲管配置和气门正时关系，其有效地将从脉冲管加热站产生冷却的正常模式的循环反向到产生加热的反向模式。

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